Steam-boiler furnace.



No. 798,248. PATENTED AUG. 29, 1905. ES. WOOLLEY.

STEAM BOILER FURNACE.

APPLICATION FILED JAN. 9, 1905.

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No. 798,248. PATENTED AUG. 29, 1905.

HI s. WOOLLEY.

STEAM BOILER FURNACE.

APPLICATION FILED JAN. 9, 1905.

2 SHEETS-SHEET '2.

INVENTOR HYRUM S. WOOLLEY, OF PARIS, IDAHO.

STEAM-BOILER FURNACE.

Specification of Letters Patent.

Patented Aug. 29, 1905.

Application filed January 9,1905. Serial No, 240,288.

To all whom it may concern.-

Be it known that I, HYRUM S. WOOLLEY, a citizen of the United States, residing at Paris, in the county of Bear Lake and State of Idaho, have invented certain new and useful Improvements in Steam-Boiler Furnaces; and 1 do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention, which relates to steam-boiler furnaces, has for its object the production of a smoke-consuming and fuel-saving appliance adapted for application to existing furnaces without material modification thereof, the appliance being arranged in-the path of the products of combustion issuing from the firebox and serving to obtain a very violent agitation of said products, whereby the consumable portion thereof is burned Without the necessity of introducing air extraneous to the air volume which enters the fire box and serves to promote the draft and the combustion of the fuel.

The improvement, while designed more particularly for use in furnaces of the doublefire-box type,'is also capable of utilization inv connection with single furnaces; but, as will presently more fully appear, the proper operation of the improved furnace depends in a measure upon a method of stoking which is at present followed in a number of types of furnaces. This method consists in supplying green fuel alternately at the two sides of the grate-surface, whereby there is maintained at all times a bed of incandescent fuel covering a portion of the grates. In the present improvement the combustion of the products obtained from the burning of the green fuel is effected by the highly-heated products obtained from the bed of incandescent fuel, the products from the said beds being brought together outside of the fire-box and intermingled in a manner to obtain complete combustion of the carbon and other elements before the mingled products pass to the stack.

The details of the invention will now be set forth, and in connection with the specific description reference is to be had to the accompanying drawings, which illustrate the improvements in their preferred form of embodiment, it being understood that various modifications and changes may be made therein without exceeding the scope of the coneluding claims.

In the drawings, Figure 1 is a vertical longitudinal section of a steam-boiler furnace equipped with a smoke-consuming appliance embodying my invention. Fig. 2 is a horizontal section taken on line 2 2 of Fig. 1. Fig. 3 is a cross-sectional view on line 3 3 of Fig. 1. g

Referring to the drawings by numerals, l designates the fire-box, 2 2 are the grates, and 3 is the ash-pit. The inner end of the fireboxis formed by a wall 4, in the center of which is a restricted opening 5 of divergent form, the sides and base of the opening being beveled, as shown. The opening may have for its top an arch, such as illustrated, or said opening may extend to the sheet of the boiler 6.

Adjacent to the wall 4 is a bridge-wall 7 which terminates at its upper end below the boiler and is provided centrally, and therefore opposite the center of the opening 5, with a nose 8, formed by beveled surfaces 9 9, which also have a vertical deflection, as shown more clearly in Fig. 1. The bridge-wall 7 is separated from the wall 4 to provide between them what may be termed a secondary combustion-chamber 10, access to which for the removal of ashes is obtained by the opening 11 in the wall 4:. The sides of this secondary combustion-chamber are preferably inclined inwardly to direct the accumulation of ashes toward the center of the base.

In operation the entire grate-surface is cov eredwith green fuel to start the fire, and thereafter green fuel is supplied alternately at each side of said grate-surface, whereby, as pre viously stated, there is maintained at all times a bed of fuel in an incandescent condition. The products arising from the green fuel and the incandescent fuel have a common outlet through the restricted passage 5, and in passing to and through said passage these products are mixed to a certain extent, thereby efiecting a partial combustion of the smoke creating elements in the fire-box and in said opening or-passage. Leaving said opening or passage 5, the partly-mingled products enter the secondary combustion-chamber and strike forcibly against the double beveled surfaces 9 9 of the bridge-wall, whereupon the partlymingled products are subjected to violent agitation and are thoroughly mixed, with the result that all of the elements in the products which would otherwise be visible in the form of smoke are consumed and at a point in the furnace where the boiler may receive the intense heat derived from this secondary combustion.

Passing over the bridge-wall after the stated intermingling and consumption, the products transverse to and through the flues in the usual manner.

It will be observed that the secondary combustion of the mingled products of the green and incandescent fuel is obtained without the introduction of air, and that therefore said products are not subjected to the cooling influence of any extraneous medium, and the consumption of smoke is efiected without diminution of heat, and therefore without loss of efiiciency in the boiler.

From an examination of the drawings it will be evident that the appliance may be installed in any existing furnace without material modification and may be applied to single as well as double tire-box constructions. Where a single fire-box furnace is equipped with the improvement, the method of stoking above described should be followed in order to obtain the best results.

I claim as my invention 1. In a steam-boiler furnace, a partition forming the rear wall of the fire-box and hav- 5v ing a restricted vertical passage for the products of combustion, and a bridge-wall beyond said partition having deflecting-surfaces inclined toward the sides and top thereof whereby to deflect the products of combustion both 3 laterally and vertically.

2. In a steamboiler furnace, a partition forming the rear wall of the fire-box and having a central restricted passage for the products of combustion, and a bridge-wall beyond 35 "1 and adjacent to said'partition and provided with a deflecting-nose in line with said passage and formed by surfaces inclined toward the sides and top of said wall, whereby to deflect the products of combustion both verti- 4 cally and laterally.-

In testimony whereof I aflix my signaturein presence of two witnesses.

HYRUM s. WOOLLEY.

Witnesses:

W. T. NORTON, F. L. BROWNE. 

